I was searching online for the classic H vs X comparison and stumbled across this little article
Now it doesnt say what car was used (2v/4v) but it seemed somewhat helpful.
Hope this can somewhat help some of you!
http://www.mustang50magazine.com/techarticles/4376_h_x_pipe_test/index.html
Now it doesnt say what car was used (2v/4v) but it seemed somewhat helpful.
Hope this can somewhat help some of you!
http://www.mustang50magazine.com/techarticles/4376_h_x_pipe_test/index.html